PARAGENETIC RELATIONS OF COAL-BEARING AND OIL- AND GAS-BEARING FORMATIONS (EXAMPLE OF THE DON-DNIEPER TROUGH)

• Дата: 2024
• Автори: Іванова, А.В., Гаврильцев, В.Б.
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: Institute of Geological Sciences, NAS of Ukraine 2024
• Теми: carbon bearing; oil and gas bearing; paragenetic connections; vitrinite; liptinite; hydrocarbons
• Онлайн доступ: http://geojournal.igs-nas.org.ua/article/view/300093
• Назва журналу: Geological journal

The relationship between coal-bearing and oil-and-gas-bearing formations is a fundamental problem in geology. The aim of this study is to determine the paragenetic relationships between hydrocarbons with coal-bearing sediments. This is achieved through the analysis of hydrocarbon composition, hydrocarbons deposits distribution, connection with petrographic types and degree of coalification of the coal in the Don-Dnieper trough. It provides various examples of the coexistence and palaeogeographic connectivity of coal, oil, and gas-bearing formations, which is a widespread occurrence in many basins worldwide. During both peat accumulation and the transformation of organic matter from peat to coal, the Don-Dnieper trough was located in the equatorial range of paleo-latitudes. This observation is significant because it sheds light on the conditions that existed during the formation of coal in this region. This text describes the petrographic composition and degree of coalification of the concentrated and scattered organic matter in the Don-Dnieper trough. These characteristics determine the formation of liquid and gaseous hydrocarbons. Based on the distribution of hydrocarbon deposits in the Don-Dnieper trough, and their consistency with petrographic coal types and degree of coalification, carboniferous deposits are classified into several categories: coal-bearing, gas-carbon-bearing, coal-gas-bearing, gas-bearing, oil-gas-bearing, gas-oil-bearing, and oil-bearing. The distribution of coal deposits of a certain age, the degree of coalification, and the composition of organic matter are consistent with the presence of liquid or gaseous hydrocarbons. The additional data obtained strongly support the concept of a paragenetic connection between coal-bearing and hydrocarbon-containing formations.